Sepia (dry): Iron oxide and clay are glued in a mixture of plant based viscosity agents. The thin sepia is a little darker than the Sangyin Pencil, which can be considered a perfect neutral color. Very vibrant colors with redness are perfect for shadowing when combined with Sangyin pencils. Lead Diameter: 5mm Pencil Diameter: 8.5mm Cross Section: Round Wood Shaft: Natural Cedar Finish: Clear Lacquer Mat Print: Brown Dipping: Matte Sepia Dome: Matte Sepia